GE P741

Firmware Design
P74x/EN FD/N
a7
MiCOM P74
1, P742, P743
(FD) 9-
1
FD
CONTENTS
1. RELAY SYSTEM OVERVIEW 3
1.1 Hardware overview 3
1.1.1 Processor board (Main board) 3
1.1.2 Coprocessor board 3
1.1.3 Internal Communication board 3
1.1.4 Analogue Input module 3
1.1.5 Input and output boards 3
1.1.6 Power supply module 4
1.1.7 IRIG-B board 4
1.1.8 Second rear comms and EIA(RS)232 InterMiCOM board (optional) (P741 and P743) 5
1.1.9 Ethernet or redundant Ethernet board (P741 and P743) 6
1.2 Software overview 6
1.2.1 Real-time operating system 7
1.2.2 System services software 8
1.2.3 Platform software 9
1.2.4 Communication software 9
1.2.5 Protection & control software 9
1.2.6 Disturbance recorder 9
2. HARDWARE MODULES 10
2.1 Processor board 10
2.2 Coprocessor board 10
2.3 Communication board 11
2.4 Internal communication buses 11
2.5 Input module 12
2.5.1 Transformer board 13
2.5.2 Input board 13
2.5.3 Universal opto isolated logic inputs 14
2.6 Power supply module (including output relays) 14
2.7 Power supply board (including EIA(RS)485 communication interface) 14
2.8 Output relay board (standard) 15
2.9 Output relay board (High speed / High break) 15
2.10 Auxiliary power supply 16
2.11 IRIG-B board (in P741) 16
2.12 Ethernet and redundant Ethernet boards 17
2.13 Mechanical layout 17
3. RELAY SOFTWARE 18
3.1 Real-time operating system 19
3.2 System services software 19
3.3 Communication software 19
3.4 Platform software 21
3.4.1 Record logging 21
3.4.2 Settings database 21
3.4.3 Database interface 21